142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
/*
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* Copyright 1992 by Rich Murphey <Rich@Rice.edu>
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the names of Rich Murphey and David Wexelblat
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* not be used in advertising or publicity pertaining to distribution of
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* the software without specific, written prior permission. Rich Murphey and
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* David Wexelblat make no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR
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* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <X11/X.h>
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_OSlib.h"
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#include "xf86OSpriv.h"
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#include "bus/Pci.h"
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/***************************************************************************/
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/* Video Memory Mapping section */
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/***************************************************************************/
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#ifdef __OpenBSD__
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#define DEV_MEM "/dev/xf86"
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#endif
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static pointer ppcMapVidMem(int, unsigned long, unsigned long, int flags);
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static void ppcUnmapVidMem(int, pointer, unsigned long);
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Bool xf86EnableIO(void);
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void xf86DisableIO(void);
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void
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xf86OSInitVidMem(VidMemInfoPtr pVidMem)
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{
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pVidMem->linearSupported = TRUE;
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pVidMem->mapMem = ppcMapVidMem;
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pVidMem->unmapMem = ppcUnmapVidMem;
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pVidMem->initialised = TRUE;
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xf86EnableIO();
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}
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volatile unsigned char *ioBase = MAP_FAILED;
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static pointer
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ppcMapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
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{
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int fd = xf86Info.consoleFd;
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pointer base;
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#ifdef DEBUG
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xf86MsgVerb(X_INFO, 3, "mapVidMem %lx, %lx, fd = %d", Base, Size, fd);
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#endif
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base = mmap(0, Size,
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(flags & VIDMEM_READONLY) ?
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PROT_READ : (PROT_READ | PROT_WRITE), MAP_SHARED, fd, Base);
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if (base == MAP_FAILED)
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FatalError("%s: could not mmap screen [s=%x,a=%x] (%s)",
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"xf86MapVidMem", Size, Base, strerror(errno));
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return base;
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}
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static void
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ppcUnmapVidMem(int ScreenNum, pointer Base, unsigned long Size)
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{
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munmap(Base, Size);
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}
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int
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xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
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int Len)
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{
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int rv;
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static int kmem = -1;
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if (kmem == -1) {
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kmem = open(DEV_MEM, 2);
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if (kmem == -1) {
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FatalError("xf86ReadBIOS: open %s", DEV_MEM);
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}
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}
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#ifdef DEBUG
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xf86MsgVerb(X_INFO, 3, "xf86ReadBIOS() %lx %lx, %x\n", Base, Offset, Len);
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#endif
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lseek(kmem, Base + Offset, 0);
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rv = read(kmem, Buf, Len);
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return rv;
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}
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Bool
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xf86EnableIO()
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{
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int fd = xf86Info.consoleFd;
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xf86MsgVerb(X_WARNING, 3, "xf86EnableIO %d\n", fd);
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if (ioBase == MAP_FAILED) {
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ioBase = mmap(NULL, 0x10000, PROT_READ | PROT_WRITE, MAP_SHARED, fd,
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0xf2000000);
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xf86MsgVerb(X_INFO, 3, "xf86EnableIO: %08x\n", ioBase);
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if (ioBase == MAP_FAILED) {
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xf86MsgVerb(X_WARNING, 3, "Can't map IO space!\n");
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return FALSE;
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}
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}
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return TRUE;
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}
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void
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xf86DisableIO()
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{
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if (ioBase != MAP_FAILED) {
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munmap(__UNVOLATILE(ioBase), 0x10000);
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ioBase = MAP_FAILED;
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}
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}
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